Hitachi RAS-(4-12)HNP(1)(E) - Intermittent Operation of Outdoor Fan Motor (F1)(RAS-(4-6)H(V)NC1 E Only); Compressor Heater Control Mode (F3)

6 Optional functions
181
SMGB0087 rev.0 - 12/2013
6
Intermittent Operation of Outdoor Fan Motor (F1)(RAS-(4-6)H(V)NC1E only)
Press “PSW1” and select the setting condition “0” to “4” in Intermittent Operation of Outdoor Fan Motor “F1” or set the
control function No. of the external input setting to “4”, so the function can be set. This function is utilized for protection from
snow (optional function). While this function is activated, the outdoor fan motor starts intermittent operation at an outdoor
temperature of 10
o
C or less during outdoor unit stoppage (compressor stoppage), or stops the operation at 16
o
C or more.
When the compressor restarts operation, the outdoor fan motor operates in the normal mode.
Fan Motor Operation
A [s]
Fan Motor Stop
600 [s]
Contents of Function Setting
Item “F1 ”
0 1 2 3 4
Outdoor Fan Motor Operation Time
A [s]
600
(Continuous
Operation)
30 60 120 300
N O T E
• Thisisanauxiliaryfunctiontoprotecttheunitfromsnow.Insnowyregions,makesuretoprotecttheunitwithasnow-
preventionroof,fenceorsnow-preventionhood(Field-Supplied),etc..Otherwise,abnormalvibrationsduetoimbalan-
cedpropellerfanwillbecaused.
• Ifthefanmotororfancontrollerfailduringtheoutdoorfanmotorintermittentoperation,stopalltheoutdoorfanmotorto
suspendtheoperation.Checkthealarmcodeanddealproperlywiththefailurenexttimethecompressorisoperated.
D A N G E R
Becauseofthissetting,theoutdoorfancanoperateevenwhiletheoutdoorunit(compressor)stops.Displaya
noticetothateffectonareadilyvisiblepartoftheunitbody,inordertoavoidinjuriescausedbyanunintended
outdoorfanoperation.
Defrost control in demand mode (4-12 HP premium) (F1)
Press “PSW1” and select the setting condition “1” at the defrost control in demand mode.
Compressor heater control mode (F3)
Factory setting “0”. While the system is in stand-by mode, the crankcase heater will ensure the oil condition to start at any
time. This control mode causes additional crankcase heater input while the system is not expected to start.
Press “PSW1” and select the setting condition “1” at the Compressor heater control mode. The crankcase heater will be
switched off every time that the system is turned to stand-by mode, saving its input while system operation is not required.
N O T E
Whenstartingupthesystemagain,itwillremaininthermo-offmodeuntilcompressoroilbecomesreadyforthestartof
operation.Itisnotrecommendedtousethiscontrolmodewhenimmediatesystemstartingisexpected.Thepreparation
timeforthestartingwillneverexceed4hours.